In Secret Service - Book

This novel is based on the idea that Ian Fleming left a manuscript for later generations that detailed a secret of great importance to the British Royal family (amongst others). I don't know much about Ian Fleming but this book made me want to go out and read some of his books - having seen the movies. Just seems like a good idea. This book took place in at least two time frames - the present and the 30s and 40s. Well written, just enough technical detail for me and a good amount of action. A good read for sure.